EFFICIENCY OF APPLICATION OF VARIOUS METHODS FOR PLASTICITY AND STABILITY CALCULATION OF VARIETIES ON THE EXAMPLE OF SPRING BARLEY

Spring barley is a key grain-fodder and feed crop, which forms an increased yield (in comparison with other crops) due to early maturity drought resistance. Many different methods for assessing environmental plasticity stability have been developed, they are reliable informative. The purpose of this study comparative characteristic parametres calculated application various on the example varieties. experimental part work was carried out in 2013-2017 fields Omsk Agrarian Scientific Center (southern forest-steppe, Omsk). ecological were calculated: Ymin-Ymax - resistance stress, compensatory ability (according Rossielle, Hemblin); CV coefficient variation Dospekhov); K.A. adaptability Zhivotkov’s meth- od); bi linear regression productivity varieties Eberhart, Russell). Also, as follows: SI index, Hom homeostaticity Khangildin); PVSL parametre variety level Nettevich); σ2 d – coeffi- cient research results show that by differ significantly. Obviously, it necessary use methodology will bring all scattered single denominator. In case, more convenient principle ranking according parameters evaluate them sum ranks obtained each variety. Thus, ac- cording rank assessment, most stable plastic received assessment used research.